UltraMAX™ LX5248 / LX5249 9-LINE LVD SCSI TERMINATOR T H E I N F I N I T E P O W E R O F I N N O V A T I O N P D R E L I M I N A R Y A T A S H E E T KEY FEATURES DESCRIPTION The LX5248/49 IC is a Low Voltage When The LX5248/49 Is Enabled, The Differential (LVD) Terminator designed to Differential Sense (DIFFSENSE) Pin Supplies comply with the LVD termination specification in A Voltage Between 1.2V And 1.4V. the SPI-2 document. The LX5248/ 49 is designed In application, the terminator DIFFSENSE output specifically for LVD applications. Because the is connected to the system DIFFSENSE line. If LX5248/49 supports only LVD, it has lower there are no single ended or HVD devices output capacitance than multimode terminators attached to the system the LVD output will be such as the LX5240. enabled. If the DIFFSENSE line is LOW, The LX5248/49 Utilizes Linfinity’s UltraMAX indicating a single ended device, the LX5248/49 Technology which delivers the ultimate in SCSI output will be HiZ. If the DIFFSENSE line is bus performance while saving component cost and HIGH, indicating a high voltage differential board area. Elimination of the external capacitors device the LX5248/49 output will be HiZ. also mitigates the need for a lengthy capacitor The LX5248/49 IC Has A TTL Compatible selection process. The individual high bandwidth DISCONNECT Pin. The LX5248/49 is active drivers also maximize channel separation and LOW. During sleep mode, power dissipation is reduces channel-to-channel noise and cross talk. reduced to a meager 5µA, while also placing all The high-bandwidth UltraMAX architecture outputs in a HI Z state. Also during sleep mode, insures ULTRA-2 performance, while providing a the DIFFSENSE function is disabled and is clear migration path to ULTRA-3 and beyond. placed in a HI Z state. 2.5pF Typical Disabled Output Capacitance Fast Response, No External Capacitors Required 5µA Supply Current In Disconnect Mode 20mA Supply Current During Normal Operation Logic Command Disconnects All Termination Lines bs ol et e Diffsense Line Driver Current Limit And Thermal Protection Compliant with SP1-2 (Ultra2) and SP1-3 (Ultra 160) Pin Compatible With Industry Standard Multi-Mode Terminators For UCC5240 Pin Compatible LVD ONLY Terminator (See LX5245/5246) IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com PRODUCT HIGHLIGHT Bus Voltage VOD VOD = V(-) - V(+), Logic = 0 100mV NEGATED 0V V(-) -100mV O VCM V(+) LX5248/49 TA (°C) 0 to 70 DB LX5248/49 PACKAGE ORDER INFO Plastic TSSOP Plastic TSSOP PW 24-Pin 36-Pin PW Plastic TSSOP 28-Pin RoHS Compliant / Pb-free Transition DC: 0535 RoHS Compliant / Pb-free Transition DC: 0442 RoHS Compliant / Pb-free Transition DC: 0518 LX5249CDBK LX5249CPW LX5248CPW Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX5249CDBK-TR) Copyright © 2001 Rev. 0.6b,2005-08-29 LINFINITY MICROELECTRONICS INC. 11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570 1 PRODUCT DATABOOK 1996/1997 UltraMAX LX5248/LX5249 9 - L I N E LV D S C S I T E R M I N A T O R P R E L I M I N A R Y A B S O L U T E M A X I M U M R AT I N G S D A T A S H E E T PACKAGE PIN OUTS (Note 1) TermPwr Voltage .............................................................................................. +6.5V Signal Line Voltage ................................................................................... 0V to 6.5V Differential Voltage ................................................................................... 0V to 6.5V Operating Junction Temperature Plastic (PW Package) ................................................................................... 150°C Storage Temperature Range .............................................................. -65°C to 150°C Lead Temperature (Soldering, 10 seconds) .................................................... 300°C RoHS / Pb-free Peak Package Solder Reflow Temp.(40 sec. max. exp.)...260°C(+0, -5) 1 36 2 35 3 34 4 33 5 32 6 31 7 30 8 29 9 28 10/ 27 bs ol et e Note 1. Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of the specified terminal. N.C. N.C. N.C. 1+ 12+ 2HEATSINK/GND HEATSINK/GND HEATSINK/GND 3+ 34+ 45+ 5DISCONNECT GND T H E R M A L D ATA DB PACKAGE: THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA 50°C/W PW PACKAGE: THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA 100°C/W Junction Temperature Calculation: TJ = TA + (PD x θJA). The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. MASTER / SLAVE FUNCTION TABLE MASTER / SLAVE DIFFSENSE Status Output Current L* H Open (Pull-up) HI Z 1.3V 1.3V 0mA 15mA Source 15mA Source DIFFSENSE / POWER UP / POWER DOWN FUNCTION TABLE L L L H Open L < 0.5V 0.7V to 1.9V H > 2.4V X X O DIFFSENSE Outputs Status Type Disable Enable Disable Disable Disable HiZ LVD HiZ HiZ HiZ 26 12/ 25 13/ 24 14/ 23 15/ 22 16/ 21 17/ 20 18/ 19 LX5249C ("N.C." = No Internal Connection) DB PACKAGE (Top View) 1+ 12+ 23+ 34+ 45+ 5DISCONNECT GND 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 16 10/ 15 11/ 14 12/ 13 VTERM N.C. 99+ 88+ 77+ 66+ DIFFSENSE MASTER/SLAVE LX5249CPW ("N.C." = No Internal Connection) PW PACKAGE (Top View) * When in Low state, terminator will detect state of DIFFSENSE line. LX5248/LX5249 DISCONNECT 11/ VTERM HVD LVD SE 99+ 88+ HEATSINK/GND HEATSINK/GND HEATSINK/GND 77+ 66+ DIFF B DIFFSENSE MASTER/SLAVE Quiescent Current 2mA 21mA 2mA 10µA 10µA N.C. 1+ 12+ 2N.C. 3+ 34+ 45+ 5DISCONNECT GND 1 28 2 27 3 26 4 25 5 24 6 23 7 22 8 21 9 20 10/ 19 11/ 18 12/ 17 13/ 16 14/ 15 VTERM LVD 99+ 88+ N.C. 77+ 66+ DIFFB DIFFSENSE MASTER/SLAVE LX5248CPW ("N.C." = No Internal Connection) PW PACKAGE (Top View) RoHS / Pb-free 100% Matte Tin Lead Finish 2 Copyright © 2001 Rev. 0.6b PRODUCT DATABOOK 1996/1997 UltraMAX LX5248/LX5249 9 - L I N E LV D S C S I T E R M I N A T O R P R E L I M I N A R Y D A T A S H E E T R E C O M M E N D E D O P E R AT I N G C O N D I T I O N S Parameter Symbol Termpwr Voltage Signal Line Voltage Disconnect Input Voltage Operating Junction Temperature Range LX5248 / LX5249 (Note 2) Recommended Operating Conditions Min. Typ. Max. VTERM Units 3.0 0 0 5.25 5.0 VTERM V V V 0 70 °C bs ol et e Note 2. Range over which the device is functional. ELECTRICAL CHARACTERISTICS (Unless otherwise specified, these specifications apply over the operating ambient temperature range of 0°C ≤ TA ≤ 70°C. TermPwr = 3.3V, DISCONNECT: LX5248/49 = L. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) Parameter Symbol Test Conditions LX5248 / 5249 Min. Typ. Max. Units 21 5 1.25 112 105 200 2.5 0 1 150 25 10 1.375 125 110 300 mA µA V mV Ω Ω pF µA µA ms 1.3 1.4 15.0 200 10 V mA µA µA 0.8 2.0 10 V µA 0.8 2.0 10 V µA LVD Terminator Section TermPwr Supply Current LVD ICC Common Mode Voltage Offset Voltage (Fail Safe Bias Voltage) Differential Terminator Impedance Common Mode Impedance Output Capacitance Output Leakage VCM VFSB ZD ZCM CO ILEAK Mode Change Delay tDF All term lines = Open DISCONNECT: LX5248/49 = H Open circuit between - and + (see Note 3) VOD = -1V to 1V 0V to 2.5V DISCONNECT: LX5248/49 = H DISCONNECT: LX5248/49 = H, VLINE = 0 to 4V, TA=25°C DISCONNECT: LX5248/49 = H, VTERM = 0V, VLINE = 2.7V DIFFSENSE = 1.4V to 0V 1.125 100 100 100 100 2 DIFFSENSE Section DIFFSENSE Output Voltage DIFFSENSE Output Source Current DIFFSENSE Sink Current DIFFSENSE Output Leakage VDIFF IDIFF ISINK (DIFF) ISINK (DIFF) DIFFSENSE = 0V VIN = 2.75V DISCONNECT: LX5248/49 = H, TA = 25°C 1.2 5.0 DISCONNECT Section DISCONNECT Threshold Input Current VTH IIL DISCONNECT: LX5248/49 = 0V O MASTER / SLAVE Section MASTER / SLAVE Threshold Input Current VTH (MS) IIL (MS) MASTER / SLAVE: LX5248/49 = 0V Note 3. Open circuit failsafe voltage. Copyright © 2001 Rev. 0.6b 3 PRODUCT DATABOOK 1996/1997 UltraMAX LX5248/LX5249 9 - L I N E LV D S C S I T E R M I N A T O R P D R E L I M I N A R Y A T A S H E E T BLOCK DIAGRAM Power ON VTERMPWR 1 of 9 1.07mA bs ol et e Internal VREF 1.30V HVD LVD Zcm 200 LVD 1.25V ZD(-) 52.5 ZD(+) 52.5 SE HVD LVD M/S LVD (+) SE 10mA DIFFSENSE 1.07mA HVD Window Comp. DIFF B LATCH LVD SE O Power ON 4 LVD (-) HVD LVD SE Power ON & Mode Change Delay FIGURE 1 — LX5248 / 5249 Block Diagram Copyright © 2001 Rev. 0.6b PRODUCT DATABOOK 1996/1997 UltraMAX LX5248/LX5249 9 - L I N E LV D S C S I T E R M I N A T O R P R E L I M I N A R Y D A T A S H E E T FUNCTIONAL PIN DESCRIPTION Pin Designator 1-, 2-, 3-, 4-, 5-, 6-, 8-, 8-, 9-/ Description Negative signal termination lines. 1+, 2+, 3+, 4+, 5+, 6+, 7+, 8+, 9+/ Positive signal termination lines. Power supply pin for terminator. Connect to SCSI bus TERMPWR. Must be decoupled by one 4.7µF low-ESR capacitor for every three terminator devices. It is absolutely necessary to connect this pin to the decoupling capacitor through a very low impedence (big traces on PCB). Keeping distances very short from the decoupling capacitors to the VTERM pin is also critical. The value of the decoupling capacitor is somewhat layout dependant and some applications may benefit from highfrequency decoupling with 0.1µF capacitors right at VTERM pin. bs ol et e VTERM DISCONNECT/ GND/ Enables / disables terminator. See Power Down Function Table for logic level per device. Terminator ground pin. Connect to ground. MASTER / SLAVE/ Sometimes referred to as M/S pin in this data sheet. Used to select which terminator is the controlling device. MASTER/SLAVE pin High or Open enables the DIFFSENSE output drive. Please see MASTER/SLAVE Function Table. DIFFSENSE/ This is a dual function pin. It drives the SCSI bus DIFFSENS line. It is also the sense pin to detect the SCSI bus mode (LVD, SE or HVD). DIFFSENSE output drive can be disabled with Low level on the MASTER/SLAVE pin. Please see DIFFSENSE and MASTER/SLAVE Function Tables. Internally connected to DIFFB pin through 20kOhm resistor. DIFFB/ SE/ Internally connected to DIFFSENSE pin through 20kOhm resistor. It can be used as a mode sense pin when the device is a non-controlling terminator (MASTER/SLAVE pin is Low). An RC filter (20kOhm / 0.1µF) is not required on the LX5249, as it has an internal timer. Single-ended output; when High, terminator is operating in SE mode. LVD/ Low Voltage Differential output. When High, terminator is operating in LVD mode. HVD/ High Voltage Differential output. When High, terminator is operating in HVD mode. Attached to die mounting pad, but not bonded to GND pin. Pins should be considered a heat sink only, and not a true groung connection. It is recommended that these pins be connected to ground, but can be left floating. O HEATSINK/ Copyright © 2001 Rev. 0.6b 5 PRODUCT DATABOOK 1996/1997 UltraMAX LX5248/LX5249 9 - L I N E LV D S C S I T E R M I N A T O R P R E L I M I N A R Y D A T A S H E E T A P P L I C AT I O N S C H E M AT I C H O S T T E R M P O W E R V P E R IP H E R A L 1 1 + T E R M V T E R M 1 + D a ta L in e s ( 9 ) L X 5 2 4 8 L X 5 2 4 9 D IS C O N N E C T 1 - 9 9 + L X 5 2 4 8 L X 5 2 4 9 9 9 + D IS C O N N E C T D IS C O N N E C T bs ol et e D IS C O N N E C T T E R M P O W E R M /S D IF F S E N S E G N D V 4 .7 µ F D IF F B * G N D V 9 - 9 - 9 + 9 + 1 1 + / 5 2 4 9 C P W V 1 1 + C o n tr o l L in e s ( 9 ) 9 - 9 - 9 + 9 + T E R M L X 5 2 4 8 L X 5 2 4 9 D IS C O N N E C T D IF F S E N S E D IF F S E N S E O * D IF F B P in n o t p r e s e n t o n L X 5 2 4 8 C P W M /S G N D D IF F B * D IS C O N N E C T G N D 4 .7 µ F D IS C O N N E C T D IF F B * L X 5 2 4 8 L X 5 2 4 9 M /S L X 5 2 4 8 L X 5 2 4 9 D IF F S E N S E D IF F S E N S E T E R M T E R M 1 + D IS C O N N E C T M /S V 1 - D a ta L in e s ( 9 ) L X 5 2 4 8 L X 5 2 4 9 G N D D IF F B * 1 1 + T E R M M /S D IF F S E N S E D IF F B * D IF F B * P a c k a g e s . M u s t c o n n e c t D IF F S E N S s ig n a l to D IF F S E N S E p in o n P W M /S G N D p a c k a g e . FIGURE 2 — LX5248 / 5249 Application Schematic UltraMAX is a trademark of Linfinity Microelectronics Inc. PRELIMINARY DATA - Information contained in this document is pre-production data, and is proprietary to LinFinity. It may not modified in any way without the express written consent of LinFinity. Product referred to herein is offered in sample form only, and Linfinity reserves the right to change or discontinue this proposed product at any time. 6 Copyright © 2001 Rev. 0.6b